1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2 ; RUN: llc < %s -mtriple=i386-unknown-linux-gnu | FileCheck %s 3 4 ; This tests is checking for a case where the x86 load-op-store fusion 5 ; misses a dependence between the fused load and a non-fused operand 6 ; to the load causing a cycle. Here the dependence in question comes 7 ; from the carry in input of the adcl. 8 9 @vx = external local_unnamed_addr global <2 x i32>, align 8 10 11 define void @pr36274(i32* %somewhere) { 12 ; CHECK-LABEL: pr36274: 13 ; CHECK: # %bb.0: 14 ; CHECK-NEXT: movl vx+4, %eax 15 ; CHECK-NEXT: addl $1, vx 16 ; CHECK-NEXT: adcl $0, %eax 17 ; CHECK-NEXT: movl %eax, vx+4 18 ; CHECK-NEXT: retl 19 %a0 = getelementptr <2 x i32>, <2 x i32>* @vx, i32 0, i32 0 20 %a1 = getelementptr <2 x i32>, <2 x i32>* @vx, i32 0, i32 1 21 %x1 = load volatile i32, i32* %a1, align 4 22 %x0 = load volatile i32, i32* %a0, align 8 23 %vx0 = insertelement <2 x i32> undef, i32 %x0, i32 0 24 %vx1 = insertelement <2 x i32> %vx0, i32 %x1, i32 1 25 %x = bitcast <2 x i32> %vx1 to i64 26 %add = add i64 %x, 1 27 %vadd = bitcast i64 %add to <2 x i32> 28 %vx1_0 = extractelement <2 x i32> %vadd, i32 0 29 %vx1_1 = extractelement <2 x i32> %vadd, i32 1 30 store i32 %vx1_0, i32* %a0, align 8 31 store i32 %vx1_1, i32* %a1, align 4 32 ret void 33 } 34
